Home
Class 9
MATHS
If x is the mean of x1, x2, ..... ,xn, t...

If x is the mean of `x_1, x_2, ..... ,x_n`, then for `a ne0`, the mean of `ax_1, ax_2, .... ,ax_n,(x_1)/a,(x_2)/a,....,(x_n)/a` is

A

`(a+1/a)barx`

B

`(a+1/a)(barx)/2`

C

`(a+1/a)(barx)/n`

D

`((a+1/a)barx)/(2n)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    MTG IIT JEE FOUNDATION|Exercise Exercise (Match the following)|2 Videos

  • STATISTICS

    MTG IIT JEE FOUNDATION|Exercise Exercise (Assertion and Reason Type)|5 Videos

  • STATISTICS

    MTG IIT JEE FOUNDATION|Exercise NCERT SECTION (Exercise 14.4)|7 Videos

  • QUADRILATERALS

    MTG IIT JEE FOUNDATION|Exercise Olympiad/HOTS CORNER|15 Videos

  • TRIANGLES

    MTG IIT JEE FOUNDATION|Exercise OLYMPAID/ HOTS CORNER|10 Videos

Similar Questions

Explore conceptually related problems

Let barx be the mean of x_1,x_2,.....x_3 and bary be the mean of y_1,y_2,....,y_n . If barz is the mean of x_1,x_2,.....,x_n,y_1,y_2,....y_n , then barz =

If barx is the mean of x_1, x_2, x_3, ... .. , x_n , then sum_(i=1)^(n)(x_i-barx)=

The mean of X_(1),x_(2) ,………, x_(n) is 10 ,then the mean of 5x_(1),5x_(21) ….. 5_(x)n is:

Let barx be the mean of x_(1), x_(2), ………, x_(n) and bary be the mean of y_(1), y_(2),……….,y_(n) . If barz is the mean of x_(1), x_(2), ……………..x_(n), y_(1), y_(2), …………,y_(n) , then barz is equal to

If the mean of observations x_1,\ x_2,\ ddot,\ x_n is x , then the mean of x_1+a ,\ x_2+a ,\ ,\ x_n+a is (a) a x (b) x -a (c) x +a (d) ( x )/a

If the arithmetic mean of the numbers x_1 , x_2, x_3,……., x_n is barx , then the arithmetic mean of the numbers ax_1 + b, ax_2 + b, ax_3 + b, ……, ax_n + b , where a and b are two constants, would be:

If the arithmetic mean of the numbers x_(1),x_(2),x_(3),...,x_(n) is bar(x), then the arithmetic mean of the numbers ax_(1)+b,ax_(2)+b,ax_(3)+b,...,ax_(n)+b where a,b are two constants,would be

MTG IIT JEE FOUNDATION-STATISTICS-Exercise (Multiple Choice Question)
  1. If barx is the mean of x1, x2, x3, ... .. , xn, then sum(i=1)^(n)(xi-b...

    Text Solution

    |

  2. If each observation of a data is incre ased by 7, then their mean

    Text Solution

    |

  3. If x is the mean of x1, x2, ..... ,xn, then for a ne0, the mean of ax...

    Text Solution

    |

  4. The mean of the marks scored by 40 students was found to be 35. Later ...

    Text Solution

    |

  5. The mean of 90 items was found to be 45. Later on it was discovered th...

    Text Solution

    |

  6. The mean of 53 observations is 36. Out of these observations, the mean...

    Text Solution

    |

  7. There are 50 numbers. Each number is subtracted from 43 and the mean o...

    Text Solution

    |

  8. The median of the numbers 9, 5, 7, 17, 13, 18, 13, 9, 5, 17, 13, 12, 1...

    Text Solution

    |

  9. The median of the numbers 45, 34, 65, 48, 93, 54, 22, 86, 45, 87 is

    Text Solution

    |

  10. Mode of the data 51, 14, 71, 15, 91, 2, 51, 19, 41, 51, 18, 15, 51 is

    Text Solution

    |

  11. For drawing a frequency polygon of a continuous frequency distribution...

    Text Solution

    |

  12. The marks obtained by 20 students of a class in a test (out of 50) are...

    Text Solution

    |

  13. The class mark of the class 150 - 170 is

    Text Solution

    |

  14. The mean of eight numbers is 40. If one number is excluded, their mean...

    Text Solution

    |

  15. The median of the data arranged in ascending order 8, 9, 12, 18, (x + ...

    Text Solution

    |

  16. The points scored by a kabaddi team in a series of matches are as foll...

    Text Solution

    |

  17. The marks obtained by 12 students of a class in a test are 36, 27, 5, ...

    Text Solution

    |

  18. Find the mean of the following distribution:

    Text Solution

    |

  19. The class marks of a frequency distribution are 104, 114, 124, 134, 14...

    Text Solution

    |

  20. Find the mean of the following marks of 20 students on a screening tes...

    Text Solution

    |